RFR: 8284047: Harmonize/Standardize the SSLSocket/SSLEngine/SSLSocketSSLEngine test templates [v2]

[Matthew Donovan]

> * Refactored SSLContextTemplate and SSLSocketTemplate to put common code in one base class (SSLContextTemplate)
> * Updated TLS/SSL tests to extend SSLSocketTemplate where possible.
> * Updated SSLEngineTemplate to accommodate changes in SSLContextTemplate. To keep this changeset to a reasonable size, updates to SSLEngine tests will be made under JDK-8301194.

Matthew Donovan has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains six additional commits since the last revision:

 - updated certificate info
 - Merge branch 'master' into templates
 - reverted changes, removed SSLSocketSSLEngineTemplate, updated SSLEngineBadBufferArrayAccess.java
 - fixed compilation errors
 - Merge branch 'master' into templates
 - 8284047: Harmonize/Standardize the SSLSocket/SSLEngine/SSLSocketSSLEngine test templates

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Changes:
  - all: https://git.openjdk.org/jdk/pull/12555/files
  - new: https://git.openjdk.org/jdk/pull/12555/files/3a88fbeb..7e4c0740

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=12555&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=12555&range=00-01

  Stats: 24721 lines in 945 files changed: 13574 ins; 6583 del; 4564 mod
  Patch: https://git.openjdk.org/jdk/pull/12555.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/12555/head:pull/12555

PR: https://git.openjdk.org/jdk/pull/12555